Amino Acid Chemistry in Human Body
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Questions and Answers

Which proteins defend vertebrates against bacterial and viral infections?

  • Antibodies (correct)
  • Actin and myosin
  • Collagen, elastin, keratin
  • Histones
  • Which protein is the photoreceptor in retinal rod cells?

  • Elastin
  • Rhodopsin (correct)
  • Insulin
  • Keratin
  • What is the primary role of membrane proteins?

  • Creating mechanical support
  • Producing nerve impulses
  • Regulating gene transcription
  • Relaying signals within cells (correct)
  • Which amino acid derivative is NOT an example of a polypeptide hormone?

    <p>Thyroid hormone</p> Signup and view all the answers

    At neutral pH, amino acids are predominantly found in which form?

    <p>Zwitterions</p> Signup and view all the answers

    Which biomolecule is the second-largest component in human muscles, cells, and other tissues?

    <p>Protein</p> Signup and view all the answers

    What is the unique role that proteins play in biological systems?

    <p>Enzymatic catalysis</p> Signup and view all the answers

    Which protein is responsible for transporting potassium into cells and sodium out of cells to create concentration gradients for nerve cell function?

    <p>Na-k pump</p> Signup and view all the answers

    Which protein serves as reserves of metal ions and amino acids that can be mobilized for maintenance and growth?

    <p>Ferritin</p> Signup and view all the answers

    What is the major role of proteins in muscle function?

    <p>Co-ordinated motion</p> Signup and view all the answers

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